Attachment foe



C. LOMBARDI AND J. MARCUS.

BLINDSTITCHING AITACHMENT FOR SEWING MACHINES.

APPLICATION nusn JULY 5.1911.

1,3 1 4,820. Patented Sept. 2, 1919. I

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UNITED STATES PATENT OFFICE.

CYRUS LOMBARDI, or CONEY ISLAND, AND JACOB MARCUSLOF nAsT NEW YORK, N.Y.

BLINDS'IITCHIN G ATTACHMENT FOR SEWING-MACHINES.

To all whom it may concern Be it known that we, CYRUs LOMBARDI and JasonMARCUS, subject of. the King of j chines, of which'the following isa'full, clear,

concise, and exact description.

Our invention relates to an attachment for sewing machines, andparticularly to a mechanism. for sewing a blind stitch.

The object of the invention is to provide such a mechanism that may bereadily attached to the presser-foot bar of a sewing machine, and beadjustedthereon to perform .allthe functions relating .tothe guiding. ofthe. material to be sewed in a simple and eXpeditious manner, andwithout the aid of any guide plates or attachments on the bed plate ofthe machine.

.The invention consists in general of a presser-foot provided with guideflanges, which may be manipulated and adjusted thereon so that a varietyof thicknesses of material may be-sewed, and so that the needle may.penetrate, the upper layer of the mate rial to any desired depth. 1

In the accompanying drawing, Figure 1 isa perspectiveview of themechanism as attached; to the presser-foot bar; Fig. 2 is across-section of the mechanism taken on line 22 of Fig. 1:; and Fig. 3is, a fragmentary front view of the mechanism taken on the line 3-3 ofFig. 1, showing in cross-section two layers of the material to be sewedtogether.

Referring to Fig. 1 the presser-foot 1 is attached to the presser-footbar 2 of an ordinary sewinghmachine. This presser-foot consists of thebody portion 3 and the foot or flange 4, linked at 5 so as to pressagainst the material in slightly yielding fashion.

. Mounted on presser-foot 1 is a guide block 6,

by means of the projecting shanks 7 and 7 thereof engaging grooves 8 and8 on the foot 1. This guide block 6 is adjustable in a horizontaldirection by means of the screw 9, rotatably fastened on presser-foot 1by plate 10 and entering into the body of the block 6. The block 6 maybe permanently fixed in any desired relation to presserfoot 1 by thescrew 12, which clamps the two Specification of Letters Patent.

Applicatiofi filed July 5, 1917.

Patented Sept. 2,1919.

SeriaLNo 178,608.

parts together, by being screwed into the body portion 3 of thepresser-foot 1, and by having the head thereof with the washer 13overlapping the edge of the projectingshank 7 in whicha slot 14: is cutto limit the extent to which the block .6 may be moved away from.presser-foot 1. V

Yieldingly mountedon the block :6 is a guide-member 16, by means of theshank 17 entering into a slot 18 onthe block .6 and by having a slot 19cut therein through which a a pin.20, fixed on block- 6, is passed. Aspring 21 is inserted in a vertical hole 22 in the guide member 16between the pin 20 and the bottom of hole-22,to hold the guide member 16in a downward position. This member 16 has .a forward projecting foot orflange 23 lyingparallel withbut 1n a plane at right angle to the foot orflange 4. The cover plate 25, fixed on theside of the guide blockl6, isprovided with a slot ,(not shown) through which the stud 27 is passedand held in the shank 17 of guide member 16. This stud 27 maybe used bythe operator to lift the guide member 16 ina verticaldirection. Mountedfixedly on the guide-member 16 is the mounting block 29, by means ofscrew 30 and dowel pin 31. (See Fig.1). The guide flange or foot 32whiohlies parallel with flange 23 is provided with a rightangleround-projectingpin 33 thatenters in hole 34 in block: 29. The flange32is movable in a horizontal direction by movement of the pin 33horizontally in the hole 34 and vertically by rotation. of the pin 33.in the hole 34:, the flange 32 being by this means adjustable in ahorizontal and vertical relation to thefiange 23. The flange 32 may befixed permanently in block 29 by means of the screw 35.

The operation of the mechanism is as follows: The presser-foot l islowered in the usual manner and [the material is placed onthe bed plate36 with the edge of the under-layer 37 the desired distance to the rightfrom the presser-foot 1. This dis tance is determined by flange 32 whichmay be shifted to the right or left, depending on thewidth oftheover-lapping edge desired on the under layer 37 in relation to the upperlayer 41. This flange 32 may also be pressed down against the bed-plate36 so as to insure agood firm guide a ainst sirable not to use thisguide 32, and the block .29 may then be entirely removed from guidemember 16 by unscrewing the mounting screw 30. Then againitmay bedesirable to only temporarily dispense with the.

use vof the guide 32, and it may then be turned out of the way of theunder layer 37 by rotating it with the knob "40 and clamping it in sucha position by screw 35. v

The upper layer 41 that is to be blindstitched to'the under-layer 37 onthe table is folded and passed underneath the presserfoot withthe foldpressed against the verti'cal guide plate 23, which has been adjusted ina horizontal direction'away from the flange 4, according to the depththat it is 'desiredto have the blind stitch penetrate the upperjfoldedlayer 41. The guide plate 23 of guide member 16 yieldingly adjustsitself in a vertical direction, in accordance with thejthiclrness of theunder layer 37,

and presses this layer tightly against the bed plate 36. The machine isnow set in moti'onfand' the two layers of-material are in position to bestitched together by being passed" forward by the operator and guided bythe flanges 4, 23- and 32. During the stitching the flanges 4 and 23first engage the fold in the upper layer 41 loosely as itis'fedby-the'operator, and later, press it more tightlytogether, and theneedle will therefore penetrate the upper layer 41 at e'x'actlythe rightdistance from the edge of the foldand the flange'32 will guide the underlayer-"37 softhat the upper layer 41 Willbe Stitched to the under layer37 at exactly the right position.

" Alt'hough we'have-described a particular form of our invention, it maybe constructed 'ini a variety of manners without departing 'from 'its'scope, and itis therefore limited only by the'appended claims. p v vWhat is claimed is: i

" 1. In combination with a presser-foot bar of a sewing machine, apresser-foot mounted thereon, a horizontal flange yieldingly secured "tosaid presser-foot, a'vertical flange adjustable in a horizontal andyielding in a vert cal direction in relation to the horizontal flange,means for permanently fixing Copies of this patent may be obtained forof a sewing machine, of a' presser-foot mounted- 'tliere on, ahorizontal, flange see cured to said presser-foot adapted to yield;ingly press together thematerials to jbe stitched, a vertical flangeagainst which the fold in the upper layerof thematerial is. placed,amounting block for said vertical flange mounted on the resser-foot, aspring for pressingsaid vertical flange against the under 'layerof thematerial, a screw for moving said'mounting-block" to adjustthe verticalflange' in a'horizontal relation to Y 'thehorizonta'l flange, a screwforpermanently clampin'gflsaid mounting block to said presser-foot, asecond'vertical flange against which the edge-of the under-layer ofmaterial is. placed, a mounting block for said second vertical flangemounted on said first mentioned vertical fiange, and a screw forperr'nanently clamping said second flangeion,

said block in any desired relation to the first vertical flange;

3. In combination with-a presser-foot bar of a; sewing machine, 015 a'presser foot mounted thereon, a horizontal flangeyieldingly-secured tosaid presserefoot shaped so I as to press thefo'ld of the upperlay'erfof the material to be stitched tightly at the point where theneedle penetrates the edge of the fold,-aguiding means mounted on thepresser-foot, adjustable in relation to "the horizontal flangehorizontally and verti 1 cally, means for-'securing'said guiding meansif in a fixed horizontal relationto the horizontal' flange and in' ayielding vertical relation to the under layer ofthe material, andguiding means mounted on said first-mentioned guiding means adjustablein relation. i thereto horizontally and vertically. V d

In witness whereof, we hereunto" subscribe cinemas this 27 day of JunefA. D., 191. I

CYRUS LOMBARDI." JACOB MARCUS. I

five cents each, by addressing the Commissioner of Patents, Washington,D. 0.

